IBM Verify Access EUVD-2026-57548

No authentication is required to trigger the vulnerability (CVSS PR:N). The attack is network-based with low complexity (AV:N/AC:L), meaning no special pre-configuration, elevated privileges, or unusual deployment mode is required - standard reachable instances are at risk. Impact is strictly limited to availability; the vulnerability does not expose confidential data or allow integrity modifications (C:N/I:N). Exploitation is further bounded to denial-of-service outcomes only, with no path to code execution. The primary limiting factor for real-world exploitation is attacker knowledge of a valid trigger payload, which has not been publicly disclosed; there is no known proof-of-concept at time of analysis.

The CVSS 7.5 High score is consistent with the threat model: network-reachable, unauthenticated, low-complexity exploitation producing high availability impact. However, real-world priority signals temper urgency. EPSS is only 0.29% at the 22nd percentile, indicating very low observed exploitation probability relative to the broader vulnerability population. SSVC records no current exploitation and rates technical impact as partial - suggesting degraded rather than total service failure. The most operationally significant signal is SSVC's Automatable: yes classification, meaning an attacker could sustain denial-of-service attempts via scripted, repeated requests without manual intervention, making the attack cheap to execute once a trigger payload is identified. The absence of a KEV listing and low EPSS together confirm this has not attracted active threat actor attention to date. Because the affected products are IAM platforms - whose disruption indirectly blocks authentication for all dependent applications - the blast radius for any successful exploit extends well beyond the product itself, warranting patching even absent active exploitation pressure.

An unauthenticated remote attacker sends a specially crafted network request to a reachable IBM Verify Access authentication endpoint, causing the service to enter an infinite processing loop. The affected process consumes available CPU or stalls without recovering, preventing legitimate authentication requests from completing. Because the attack is automatable, an adversary can script repeated trigger requests to maintain the denial-of-service condition with minimal ongoing effort.